氨吸收式动力/制冷复合循环的敏感性分析  

Sensitivity Analysis of Ammonia Absorption Power/ Refrigeration Combined Cycle

作　　者：罗尘丁[1] 张娜[1] 蔡睿贤[1] 刘猛[2] 

机构地区：[1]中国科学院工程热物理研究所,北京市海淀区100080 [2]中国科学院研究生院,北京市海淀区100039

出　　处：《中国电机工程学报》2008年第17期1-7,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50576096)~~

摘　　要：对氨水混合工质动力/制冷正逆耦合循环进行了模拟计算分析,该循环通过分流、精馏、吸收冷凝,满足了不同热力过程对工质氨浓度的不同需求。选取热效率η、火用效率ε等指标作为评价准则,当循环透平进汽参数为375℃/7000kPa时,η约为20%,ε约为40%。对循环重要参数分流比S、基本工质氨质量浓度X变化对热力性能、评价准则的影响进行敏感性分析,讨论不同X下如何设置分流比S使循环能量利用更为合理。研究表明:综合考虑循环功冷联供性能、经济性能等因素,建议分流比S取0.4左右,基本工质氨质量浓度X取0.28-0.32。如需较大的冷输出,可适当加大S及X,但S过高(>0.8)循环热力性能会恶化。An ammonia absorption power/refrigeration combined （APC） cycle was simulated and analyzed. The desirable working fluid ammonia concentrations in both cycle heat addition and condensation process were maintained by introducing a split/absorption condensation process. The system performance was evaluated in terms of energy and exergy efficiencies, which were found to be about 20% and 40% with the turbine inlet parameters being 375 ℃/7 000 kPa. Parametric sensitivity study was conduced to investigate the influence of some key parameters, including the split fraction S and the basic working fluid ammonia concentration X, on the cycle thermodynamic performance. It is found that there exist optimal S values around 0.4 which maximize the efficiencies, and the desirable X range is 0.28-0.32. Higher S and X favor the refrigeration output, but too high S （〉0.8） deteriorates the system performance.

关 键 词：动力/制冷正逆耦合循环 氨水混合工质 分流比 工质浓度 热力性能 

分 类 号：TK16[动力工程及工程热物理—热能工程]